side, we went on to Barnhill Quarry, near Chipping
Sadbury. Here we encountered the Carboniferous Lime-
stones with steep bedding planes. Several interesting
geological formations were indicated here, including
a classical unconformity.
On, then, to Cromhall Quarry, in the by now
sweltering heat, made all the more intense by the
white walls of the limestone quarry face and the
dusty crusher buildings. This quarry, so our hand-
out told us, "is famous for its fissures or sink
holes, containing deposits of Triassic age. These
are the cave deposits of landwashed pale green silts
and hard cemented sands. They contain rich vertebrate
fauna of Keuper age of land-living reptiles."
The day ended with a visit to the Tortworth
Inlier to see some of the oldest rocks in the area,
including Silurian and some volcanic intrustions.
On Sunday, down to the sea again, this time at
Portishead, to see a classic section of the Trias,
Carboniferous Limestone and Old Red Sandstone. Some
fine examples of folding, faulting, thrusting and
cross-bedding, and a chance to look at the Woodhill
Bay fish bed and to search for fish scales.
The good weather had begun to deteriorate, and
at the next port of call, Dundry Hill, we had some
rain. But that did not prevent search in the highly
fossiliferous Inferior Oolitic Limestones of a small
quarry there.
Our itinery should have taken in the Avon Gorge,
but there was too much traffic on the narrow, winding
road, for us to do any geologising, so we missed out
on that.
Monday was for the Mendips. The start was in
cloud and the expected splendid views did not material-
ise. We first went to a colliery near Hadstock, and
rummaged through the spoil tips for the Coal Measures
fossils, — of which there were many. Some beautiful
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